文档介绍：Emotion and Values
Important
and Difficult
Points
Knowledge Links
Process and Methods
Module1 Grammar
Date
of
can + 否定词 +too/enough 表示
You can’t be too careful. 你越小心越好
You can’t remember enough English words. 你记越多的英语单词越好。
② can’t but do sth 表示
I can ’t but admire your bravery. 我不得不佩服你的勇气 I could not but
choose to go.
Ⅱ .may, might 译为“也许”
1) 表示请求和允许。
----Might/ May I smoke in this room? ---- No, you mustn ’t.
---- May/Might I take this book out of the room? ---- Yes, you may. (No, you
can’t / mustn ’t. )
总结：might 比 may 语气 ，而不是过去式。 否定回答时可用 或 ，
表示“不可以，禁止”。注意：用 May I... ？征徇对方许可时比较正式和客气，而
用 Can I... ？在口语中更常见。
2）用于祈使句，表示祝愿。 May you succeed! 祝你成功 祝你快乐！
表示推测、可能性。
He may /might be very busy now. Your mother may /might not know the truth.
总结：表示推测用于 和 句中，疑问句用 代替。 might 不是
过去式，它所表示的可能性比 may 。
4）may/ might have done 可能做了某事 ( 猜测 ) He may/might have gone home.
注意 You might have told meearlier! 你本可以早点告诉我 ( 实际没有告诉 ) might have done 表示“过去本可以做某事而没有做。
常用句式总结
①不妨，倒不如 You may as well ask him. You might
as well stay with us.
②很可能 He may well be proud of his son. We
might well get injured.
Ⅲ .must 译为“必须” , have to 译为“不得不”
表示必须、必要
You must come here on time. I have to go now, because my mother is in
hospital.
---- Must we hand in our exercise books today? ---- Yes, you must. （ No, you
don’t have to / you needn ’t. ）
总结：①表示义务即必须时 must 强调主观，而 have to 强调 需要。 must 只
有一般现在时， have to 有更多的时态形式。
②在回答引出的问句时，如果是否定的，不能用 mustn’t （ ），而用
needn’t, don ’t have to （不必） .
3) 表示推测、可能， 只能用于 句中。其中 must have done 表示
You’re Tom’s good friend, so you must know what he likes best. Your mother must
be waiting for you now.
I didn ’t hear the phone. I must have been asleep.
表示“偏偏”表示很不巧，通常都是令人不愉快的事。
翻译句子： We were ready to leave, but the baby must catch cold.
Ⅳ .need 译为“需要”
1）Y